In trucking, IRP stands for the International Registration Plan, a reciprocity agreement among the 48 contiguous U.S. states, the District of Columbia, and 10 Canadian provinces that lets a commercial carrier register its qualifying vehicles through one home jurisdiction and operate across the entire network with a single license plate and registration document. Instead of buying plates in every state a truck enters, the carrier pays one combined fee to its base jurisdiction, which then distributes each other jurisdiction’s share based on the miles the carrier actually drove there. The result is proportional revenue for every region the truck uses, and far less paperwork for the carrier.
How the One-Plate System Works
A carrier picks one base jurisdiction where it has an established place of business and keeps its operational records. That office handles the whole registration: it collects the total fee, issues the plate, and splits each jurisdiction’s cut according to the carrier’s reported mileage. The carrier gets back two things that matter on the road: an apportioned plate for the truck and a cab card that lists every jurisdiction the vehicle can operate in and the weight it’s authorized to run at in each one.
Since January 1, 2015, under what the IRP calls the Full Reciprocity Plan, every member jurisdiction is automatically listed on the cab card. Before that, carriers had to predict their routes a year ahead and name the states they expected to run; an unexpected load into an unlisted state meant buying a trip permit or amending the registration mid-year. That guesswork is gone. One plate, one card, every jurisdiction covered.
Which Vehicles Have to Register Under the IRP
IRP applies to vehicles used to carry people for hire or to haul property, and only when the vehicle crosses into at least one other member jurisdiction. A vehicle needs apportioned registration if any of the following is true:
- It has two axles and a gross vehicle weight or registered gross vehicle weight over 26,000 pounds.
- It has three or more axles, regardless of weight.
- It is used in combination (power unit plus trailer) and the combined gross weight exceeds 26,000 pounds.
A two-axle straight truck or cargo van under 26,000 pounds that never pulls a trailer over the combined threshold stays on standard local registration, even if it crosses state lines. Government-owned vehicles (including school buses owned or leased by a government entity), personal-use RVs, vehicles on restricted-use plates, city pick-up and delivery vehicles, and historical or antique vehicles are generally excluded as well. Some of those can register under IRP voluntarily, but they aren’t required to.
If a vehicle meets the thresholds and crosses a jurisdictional line without valid apportioned registration, the usual roadside outcomes are fines or an on-the-spot tow.
What Apportioned Registration Costs
Each member jurisdiction sets its own fee schedule, typically keyed to vehicle weight. The carrier’s total bill is the sum of each jurisdiction’s fee weighted by the share of miles the truck ran there. If 40% of annual mileage was in one state and 20% in each of three others, the fee splits 40/20/20/20 across those four.
Because rates vary jurisdiction to jurisdiction, two carriers with identical mileage totals can get very different invoices depending on where they run. Annual registration for a heavy truck commonly lands somewhere in the $1,000 to $3,000 range, but the actual number depends on fleet weight and the mileage distribution. Some jurisdictions also require payment of ad valorem (personal property) taxes on the vehicle before they’ll issue the plate, and those are on top of the registration fee itself.
What You Need Before You Apply
Apportioned registration takes more documentation than a standard plate. Before submitting an application to the base jurisdiction, a carrier should have:
- A USDOT number, issued through FMCSA’s Unified Registration System.1Federal Motor Carrier Safety Administration. Getting Started with Registration
- Proof of Heavy Vehicle Use Tax payment for any vehicle with a taxable gross weight of 55,000 pounds or more. That means a stamped IRS Form 2290 Schedule 1. The tax runs from $100 at 55,000 pounds up to $550 for vehicles over 75,000 pounds.2Internal Revenue Service. About Form 2290, Heavy Highway Vehicle Use Tax Return
- Proof the carrier has a physical presence in its base jurisdiction, such as utility bills, a property lease, or incorporation documents.
- Distance records showing miles traveled in each jurisdiction during the previous July-through-June reporting period. A new carrier with no history submits estimates based on planned routes.
- Vehicle information: VINs, purchase prices, and factory-rated weights for every unit being registered.
Accuracy on the distance figures matters because those numbers determine what every jurisdiction charges. Sloppy mileage reporting is one of the first things auditors flag.
Insurance Minimums
Interstate carriers also have to meet federal financial responsibility rules before they can operate. For-hire carriers hauling non-hazardous property in vehicles rated at 10,001 pounds or more need at least $750,000 in liability coverage per accident. Hazardous materials carriers face steeper minimums, up to $5,000,000 per accident depending on what and how much they haul.3eCFR. 49 CFR Part 387 – Minimum Levels of Financial Responsibility for Motor Carriers
Staying Compliant After You Have the Plate
The cab card has to stay in the truck at all times. During a roadside inspection, it’s the document that proves the carrier has met its registration obligations for interstate travel.4Federal Motor Carrier Safety Administration. PRISM IRP Cab Card and Bar Code Specifications Not having it in the vehicle is treated the same as not being registered at all.
Registrations run 12 months. Most jurisdictions assign each IRP account a specific renewal month and stagger accounts across the calendar, so a carrier’s renewal date won’t necessarily be January 1. Every vehicle on the account expires together, on the last day of the assigned month. There is generally no grace period; enforcement starts the next day.
Record-keeping is where carriers get into real trouble. The IRP requires detailed distance records for every vehicle, kept for at least five and a half years from the filing date of the annual renewal. Trip reports completed by the driver have to include trip dates, origin and destination, routes, beginning and ending odometer readings, total and per-jurisdiction miles, the vehicle unit or VIN, and the driver’s name. Carriers using GPS tracking need position data captured at least every 15 minutes while the engine is running, stored in a spreadsheet-compatible format like CSV; screenshots and PDFs don’t qualify. Electronic logging devices on their own may not be enough, because ELDs don’t always capture the jurisdiction-level mileage detail an auditor expects.
If an audit finds a carrier underreported mileage in a jurisdiction, the carrier owes the fee difference plus interest. Systematic underreporting signals underpayment across the board and can trigger a full fleet review going back years.
When You Only Need a Short-Term Fix
A carrier that needs to move a vehicle into a jurisdiction on a one-off basis can buy a temporary trip permit instead of adding the state to the registration. These are typically valid for a short window, often around 72 hours to 10 days depending on the issuing jurisdiction, and cover a single round trip. They’re useful for repositioning an empty truck or taking an unexpected load before the next renewal.
A related option is the hunter’s permit, aimed at owner-operators between lease agreements who need to move an empty truck while looking for work. Hunter’s permits are usually inexpensive and good for around 10 days. Trip permits work as an occasional stopgap, but a carrier that keeps running the same state on temporary permits should add it to the IRP registration. Pattern reliance on short-term permits reads as noncompliance and invites audit attention.
What IRP Does Not Cover
IRP handles registration fees and nothing else. Two other interstate compliance programs apply to most of the same carriers, and it’s a common mistake to assume the apportioned plate takes care of them.
The International Fuel Tax Agreement (IFTA) uses the same apportioned principle, but for fuel taxes. Carriers file quarterly through their base jurisdiction, reporting miles driven and fuel purchased in each member jurisdiction. Vehicles that qualify for IRP almost always need IFTA credentials as well, and IFTA keeps its own set of records separate from IRP distance reports.
The Unified Carrier Registration (UCR) is an annual federal registration for interstate motor carriers, brokers, freight forwarders, and leasing companies, with fees based on fleet size. For 2026, a carrier operating zero to two vehicles pays $46; a carrier with more than 1,000 vehicles pays $44,836.5Unified Carrier Registration. Unified Carrier Registration UCR is straightforward to file, but skipping it draws fines at inspections and audits just like skipping IRP would. A carrier setting up interstate operations should plan on handling all three together rather than finding out about IFTA and UCR after a roadside stop.